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Double Glazing Costs

Double glazing The cost of having double glazing installed will vary based on a range of factors including the size, style and material of window you choose. You might also find that window prices can vary based on where you live, with areas like London often seeing higher costs. The best way to find out what your new windows will cost is to compare quotes from multiple companies. Not only does this give you an estimate of price, but can also prevent you from paying over the odds when other fitters will carry out the work for less.

uPVC double glazing costs

Consumer specialist Which? has created a guide to double glazing costs, based on typical prices from 15 double glazing companies. They based the costs on ‘standard white uPVC frames with B-rated glass and include materials, labour, removal and disposal of existing windows, internal and external ‘making good’, VAT and incidentals’. Whilst the below figures can provide a rough guide, it’s important to note that they may not be exact due to the number of factors affecting the cost of having new windows fitted.

Casement uPVC double glazing costs

Property Type Size/ Number of Windows Price
600x900mm £260-£330
600×1200 £280-£360
1200x1200mm £350-£420
Small terraced house 6 windows £2,100 – £2,480
Semi- detached house 8 windows £3,100 – £3,540
Large detached house 12 windows £4,390 – £5,600

Sash uPVC double glazing costs

Property Type Size/ Number of Windows Price
  600x900mm £490-£710
1200×1200 £570-£900
1000x1500mm £710-£960
Small terraced house 6 windows £3,500 – £5,080
Semi- detached house 10 windows £4,760 – £7,250
Large detached house 17 windows £7,550 – £11,970


What can push window prices up?

It’s important to take into account that certain additional features can push up the cost of a widow installation. Opting for a basic white uPVC window will help to keep costs to a minimum if you’re on a budget, but if you are considering something beyond that, here’s some of the things that you may need to factor in.

Frame material

Price can vary dramatically between window frame materials, for example aluminium frames could be as much as twice the cost of uPVC! You may however want to weigh up the pros and cons of each material, as some may have a longer lifetime or provide additional energy saving benefits.

Window colour and effect

A coloured uPVC frame, or one with a wood grain effect added, can cost around 15-40% more than a standard white version. There should however be no additional cost for installing this type of frame instead of traditional white uPVC.

Glass efficiency

A rated windows offer a higher level of energy efficiency, however they will cost more than the standard B rated windows listed in the tables above. You also have the option of having low emissivity, or low-e for short, coatings added to your glass. Again, this will increase energy performance (by up to 40%) but it will push costs up.


Double glazing maintenance costs

Double glazing shouldn’t need a great deal of maintenance, especially at the start of its life. In the majority of cases your new windows should have a guarantee (generally 10 years) so you should be protected during this period. The main problem homeowners face with double glazed windows is fogging, when condensation occurs between the panes of glass and generally the solution to this is having the glazed part of the window replaced. If this happens outside of your guarantee period, you may need to pay for a replacement unit.


Are there any double glazing grants?

Currently there are no grants available for double glazing in the UK. Previously, homeowners could receive a grant style loan through a scheme called the Green Deal, which would cover double glazing installation, however funding was pulled from the Green Deal in 2015. Many homeowners actually opted to finance double glazing themselves whilst the Green deal was still open as they felt that it gave them a better return on investment.


Beware of disreputable companies

Unfortunately many consumers have a negative view on window fitters due to the pushy sales tactics of some disreputable companies. Whilst the majority of companies will offer a truthful and fair price for double glazing, it’s important to source and compare quotes from multiple reputable companies. Windows Guide only works with FENSA, BM Trada and/or Certass registered installers, so you can have peace of mind that the companies quoting for your job are certified.

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